Finding the Fourth Proportional to 128,103.13, 176,819.86 and 74,412.28
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Solution
The fourth proportional to 128,103.13, 176,819.86 and 74,412.28 is: 102,710.75
Step by Step Solution
- Step 1: Write the proportion equation
128,103.13 : 176,819.86 = 74,412.28 : x - Step 2: Convert to fraction form
128,103.13/176,819.86 = 74,412.28/x - Step 3: Cross multiply
128,103.13x = 176,819.86 × 74,412.28 - Step 4: Simplify right side
128,103.13x = 13,157,568,931.88 - Step 5: Solve for x
x = 13,157,568,931.88/128,103.13 - Step 6: Final answer
x = 102,710.75
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.